Split-type falling film evaporator

2025-04-09 16:40:16

The split-type falling film evaporator is a widely used and uniquely designed device in the industrial evaporation field, with remarkable achievements in the research and manufacturing of this product by Henan Jiuyuan Chemical Equipment Co., Ltd.

Device Composition and Working Principle

The split-type falling film evaporator separates the functional components of traditional evaporators into a split design, mainly consisting of a heating chamber and a separation chamber, achieving collaborative operation through reasonable piping connections. During operation, the solution to be evaporated is evenly distributed onto the inner surface of the heating tubes by a distributor, forming a continuous and uniform liquid film, which descends in a film-like manner along the inner wall of the tube under the effects of gravity and secondary steam. At the same time, the heating medium (such as steam) flows outside the tube, transferring heat through the tube wall to the solution inside, causing the solution to boil and evaporate rapidly. The secondary steam produced is separated from the concentrated liquid in the lower tube box of the heating chamber, with the secondary steam being discharged from the top of the separation chamber after gas-liquid separation, serving as the heat source for the heating chamber of the next effect evaporator, while the concentrated liquid is discharged from the bottom of the heating chamber, completing the evaporation process.

Technical Advantages

High Efficiency in Heat Transfer

The split design allows for a more uniform distribution of the liquid material on the surface of the heating tubes, creating an ideal liquid film. The liquid film descends in a film-like manner along the inner wall of the heating tube under the influence of gravity, significantly increasing the contact area between the liquid material and the heating medium, greatly enhancing the heat transfer coefficient. Compared to traditional evaporators, this allows for a faster and more efficient evaporation process, effectively improving production efficiency. For example, in the chemical and pharmaceutical industry, efficient heat transfer can reduce the heating time of temperature-sensitive materials, lowering the risk of thermal decomposition of sensitive components.

Flexible Structure

The heating chamber and separation chamber of the evaporator are independent of each other, allowing for flexible layout and installation according to different process requirements and site conditions. The heating chamber can be installed close to the heat source to minimize heat transfer losses; the separation chamber can be reasonably arranged based on space and operational convenience. This flexibility is particularly beneficial in renovation projects for older factories with limited space.

The evaporator with a split falling film configuration is highly adaptable to various materials and process requirements. For materials with high viscosity and tendency to foul, adjustments to the heating chamber's structure and liquid film flow rate can effectively prevent scaling on the heating surface, ensuring the evaporator operates continuously and stably. For different evaporation capacity needs, precise configuration of heating tube quantity and separation chamber size can be achieved through professional thermal balance calculations, thus meeting the requirements from large-scale production to small batch specialty product manufacturing in the food and beverage industry.

Low Energy Consumption

The efficient heat transfer performance of the split falling film evaporator requires less heating medium for achieving the same evaporation capacity, thereby reducing energy consumption. Additionally, its excellent structural design results in higher secondary steam utilization efficiency, further decreasing energy use. This aligns with the current industrial development trend of energy conservation and environmental protection, assisting enterprises in lowering production costs and enhancing economic benefits while fulfilling social responsibilities.

Applications

Chemical Industry

Used in the production process of chemical raw materials for the evaporation and concentration of various reaction liquids and mother liquors, such as the concentration of inorganic acids like sulfuric and hydrochloric acid, as well as solvent recovery and concentration in organic chemical product production.

Food and Beverage Industry

Commonly utilized in juice concentration, milk concentration, sugar manufacturing, and other process stages, capable of performing evaporation operations at low temperatures to preserve the nutritional components and flavors of food and beverages to the greatest extent.

Pharmaceutical Industry

Suitable for the concentration and crystallization of drug intermediates and solvent recovery in pharmaceutical processes, with precise temperature control and efficient evaporation performance contributing to ensuring the quality of pharmaceuticals.

In the field of environmental protection, evaporation treatment can be applied to high-concentration organic wastewater and saline wastewater during sewage treatment, achieving the recycling of water resources and the reduction of pollutant discharge. In the treatment of waste gas, it can be used for the evaporation concentration of absorbent liquids to facilitate the recycling of absorbents.

In the metallurgy industry, particularly in the production of alumina, the evaporation concentration of alumina leachate is critically supported by the split-type falling film evaporator, which boasts advantages of high efficiency and energy savings, as well as adaptability to large-scale equipment, thereby helping enterprises enhance production efficiency and reduce costs.

The split-type falling film evaporator of Jiuyou Chemical, with its advanced technology and outstanding performance, is widely utilized across numerous industries, providing strong support for efficient production and energy conservation, while promoting the continuous advancement of industrial evaporation technology.

Henan Jiuyue Chemical Equipment Co., Ltd. was established in 1999 and is a comprehensive high-tech enterprise that integrates scientific research, design, manufacturing, installation, and service. It is recognized as a specialized, refined, distinctive, and innovative small giant enterprise in Henan Province. The company primarily engages in the design, manufacture, and installation of pressure vessels, various evaporators, chemical tanks, towers, and bioreactor equipment. The leading product, various types of evaporators, is widely used in industries such as alumina, papermaking, sewage treatment, biochemistry, food, chemicals, pharmaceuticals, and salt production. Notably, the energy-saving seven-effect two-stage falling film evaporator technology is at the world-leading level, and the company holds over 30 patents for the evaporators and related equipment. Throughout the company's development, its products have successfully entered major alumina enterprises including Weiqiao Aluminum, Xinfa Group, China Aluminum Group, Jinjiang Group, Rusal Group, Guangxin Aluminum Group, Jiugang Group, Tiangu Aluminum, Guizhou Qiya, Lubeh Chemical Group, and Zhongchao Aluminum, earning a strong reputation. Additionally, our products have also been successfully applied in overseas markets, such as the Rusal Kenya project, Jiugang Jamaica project, and Jinjiang and China Aluminum projects in Indonesia, achieving broad market reach and a positive social reputation.

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